36227221 has 4 divisors (see below), whose sum is σ = 38358252. Its totient is φ = 34096192.

The previous prime is 36227203. The next prime is 36227237. The reversal of 36227221 is 12272263.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21288996 + 14938225 = 4614^2 + 3865^2 .

It is a cyclic number.

It is not a de Polignac number, because 36227221 - 2⁹ = 36226709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36227201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065490 + ... + 1065523.

It is an arithmetic number, because the mean of its divisors is an integer number (9589563).

Almost surely, 2^36227221 is an apocalyptic number.

It is an amenable number.

36227221 is a deficient number, since it is larger than the sum of its proper divisors (2131031).

36227221 is a wasteful number, since it uses less digits than its factorization.

36227221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131030.

The product of its digits is 2016, while the sum is 25.

The square root of 36227221 is about 6018.9052991387. The cubic root of 36227221 is about 330.8859602945.

Adding to 36227221 its reverse (12272263), we get a palindrome (48499484).

The spelling of 36227221 in words is "thirty-six million, two hundred twenty-seven thousand, two hundred twenty-one".